Locomotive-furnace arch.



C. E. MILLER,

LOCOMOTIVE FURNACE ARCH.

APPLICATION FILED FEB. 1. 191s.

I i I I l I I l I I 1 III Patente May 4, 1915.

2 SHEETS--SHEET l.

C. E. MILLER.

LOCOMOTIVE FURNACE'RCH. APPLICATION msn rss. 7, 1913.

Patented May 4, 1915.

2 SHEETS-SHEET 2.

lil

CHLLES E. MILLER, 0F CHICAGG, ILLINOXS, ASSIG'NOR, BY MESNE ASSXGNINTS, TO

AMERECAN HCH COMPANY, 0F NEW YORK, N. Y., l CORPORATIN 0F DELAWARE.

LOQQMTXVE-FURN ARCH.

Specification of Letters Entrant.

itatenteiii may el, tuile..

.Application filed February 7, 1913, -Serial No. M.

To ait/117mm i?? muy conce/ivi. 1

lie it linoiin that @imams E. Minnen, a citiaen of the United States, and a resident of Chicago, @ook county, illinois,` have in rented certain new and useful improvements in Locoiiiotirc-Furnace Arches, which the following 'is a specification.

My invention relates generally to iin provenientes in boiler lurnaces ot' locomotives has particular reference to improve "12 in .refractory ai with furnaces haring arch sup '"he type adapt ribes.

side tubes from the side sheet, to the end that the size and lorn'is of brick required to construct arches in cliliierent locomotivescan be inaiiitaineil at a minimum.

My invention yconsis i generally in a locomotive lire bor.: having a group of arch tubes longitudinally arranged therein and spaced throug'fhoiit the width thereof, in combination Vwith a refractory arch body comprising a pliuz'ality 'of substantial identical bricks'y rest i I tonsive upon the tubes and laterally coextlierewith, andy side bricks resting upon the outer rows of the arch body anfl extending upwardly and outwardly into abutment with the side sheets, said side bricks having thcirlower ends 'formed in inner to take a plurality of positions upon o side bricks of the body portion, and heiiig; tl'iercby adapted to close spaces between LU fiole tubes and the sifle sheets of great-ly f invention also consists in the unique arrangement, construction and cooperation `I` olif parts whereby che objects 'named above and others' hereinafter appearing are attained.

ly invention T/ill be more readily ur ence to the aceoinpan encral object of iny invention is to 'ot1 brick forms obviously is drawings, forming a part of this specii'ica-- tion, and. in which: A

'.lia'ure l is a vertical, longitudinal section of ioeoinotive tire box provided with a reuse in narrow tire boxes; and Fig. 5 is a perspective view of my unique side or brick.

lt is often desirable and necessary to install arches in diierent locomotives "Wherein the arch tubes are evenly spaced, but wherein there is great disparity in the spacing of the side tubes from the side sheets. Also'in some instances there is some difiereiice in the relative spacing ofthe arch tubes themselves. Numerous arches have been constructed which are readily adjustable to irregularities in the spacing of the arch tubes and, While my arch is adapted for use in furnaces wherein the arch tubes are in irregular spaced relation, that is not the primary use for my arch. The variation of the spacing of arch tubes is usually not very great, and it is therefore comparatively tolprovide bricks adjustable to these slight iariationsrl @n the other hand, the disparity in the spacing of the side tubes troni the side sheets is often very great. i bricks have been v,devised 'for closing spaces of varying .vidtlisbetiveen the side tubes and the "side sheets. These bricks7 however, are only aclaptecl to close spaces 'varying slightly in width, Certain of the bricks hitherto cleviseil are also open to the objection that they do not form positive keys or wedges between the body of the arch and key Athe side sheets, and are therefore liable to work oil the holly, and fall into the fuel boil. Other of the side bricks hitherto devised are of such construction that they require pe culiarly formeel arch hotly bricks with whichv to coact. Arches inado from such bricks, therefore, require a great many forms of bricks for a single arch and special arrange inc-nt placing of the bricks in the arch itself., 'lhe labor required for the installation of arches compose@` of a greatnumber Greater than that i'egiiirecl oninstalling arches composed of l ain aware that tive.

but 'few brick forms. This is a 'i actor which must be' considered in determining: thev ad rantagjcs or disadyantagcs oi a locomotive arch. .lt is often necessary to repair pa rts of the arch from time to time. ln order to accomplish this readily, it is extremely `de' sirable that each brick ot the arch be sleparably detachable without the removal ofseyeral ot' the other bricks ior that purpoye.

i shall now describe indctail niy yauch which overcomes a. ,irreat many of the objections uhichhavc been urged against arches hitherto devised. .f

The locomotive lire hoxhci'e shown is one of the modern wide type hre boxes `having the usual l'lue sheets "l, side sheets 3`3, rear lsheets 4, and crown sheet `The bottom of the tire boris closed by the grate 6.v The tlues 7 extend 'toi-ward from the upper=` part of the tlue sheet and coinnn'uiicate with the smoke box at the frontend of the locon1o The arch tubes l() extend from. the lower .part oi the tine sheet .5 to the upper part oi? the rear sheet #hthus occupying an inclined position, and water lions trom the front water leg t) through to the tubes and into the rear water leg il thereby protecting the tubes trein burning. it is usual to provide four arch tubes in the wide type ot' lire bor; here shown, but it should be understood that the number oi tubes lrai-ies in the different typesoi fire boxes, there usually being a smaller number in the narrower type, as will be incre4 fully discussed here-v inafter.

lihile the arch here shown isa front arci it should be understood that it is adapted for use as a rear arch. vThe tubes are substantially equally spaced throughout the width of the fire box and the outermost tubes l0 l shall, for facilitating the description and understanding, of the invention, refer to as sidetubes." rl`he tubes iOan'd 10 serve to Isupport a pluraiity oit lbricks ii. These may have grooved sides which rest upon ythe tubes, and vertical side iii. This form of brick makes a very sohd arch body and has no' small. edges or projections to be i knocked oit.

These bricks are'ali substantlally identicall Y in torni andthe Workman does not therefore vhare to select a sneeial brick for a *particular l position in the arch. is before stated, certaino't the narrow type Atire boxes do not usually require as niany arch tubes asthe Wide type, and certain of the arches hitherto devised which are ,adapted for Wide type fire boxes are not adapted to the narrow type. My arch is not open to this objection, as will be seen by reference to Fig. i wherein I have n halvifg' :but three arch 'tubes rlthe .side bricks 13, ior the purpose of closing the spaces between the si de tubos andside sheets are the saine for .both type of tire boxes .incense oi' whiclrniay be engaged with the edge of the arch body. y

The sides oli' the tire box usually converge at the top and curve into the crown sheet. ihe arch supporting tubes since they are parallel and extend from the lower part of upper ends. Therefore, the side portions of `the upper part of the arch are closer to the side sheets than the side portions of the lower part of the arch. The spaced relation otthe arch tubes from theside sheets at the upper end and at thedowerend often varies to suchA an extent that in arches hitherto dethe tlue sheet upwardly to the rear sheet are. vobviously closer to the side sheets at their` lvised side or key bricks of two different sizes are necessary for use along a single side of the arch. This is so eren withside bricks that are capable of closing spaces of slightly diii'erent widths.

vIn Fig.v l have shown the bricks closing the relatively sinaller spaces at the upper end of the arch. `ln this instance I place the lcwerstepl. oi" the side brickl upon the l arch body.` 'The brick in this position 4is ordinarily adapted to close spaces between Athe side tubes and side .sheets of slightly varyiugdistances. For instance the brick in vthis iosition may be used for several of the upper' rows of the arch", then as the side sheets extend farther away from the side tubes to prohibit .safely closing. the space with the brick in this position, l am enabled to close the larger spaces by placing the upper step 18 of the side `brickupon the body of the arch, as shown in Fig. 3.

Thus it will be seen that where it has been customary even4 in a single furnace to provide several sizes of side bricks l need but a single form. As already stated the arch aiso has a large lfield for seryice'invthe. different types of locomotives in which the spaces between the side tubes andthe side shectsvary at given distancesfrom the tine'l sheet. i 1

Another advantage inherent in my arch is that the key brick'carries withinitself ail the elements necessary to close spaces which `vary considerably in Width. in other'words 1t is not necessary to provide a special body brick `with duch to coact. I' am, therefore,

` able to' build l'oci'irnotire arches in locomotives of *arious types with but two forms of brick, that is, a body forni and a side form.

VThe body bricks being all supportetd in like "manner and not requiring anyy special con` formation enables the most economical use of' the lirebriek. To illustrate thisv statenient conside` an arch which `requires body bricks oi' special conformation to enact with meses/.i

the side bricks. Such bricks more material than. is necessary in en ordinsry body brick which merely extends between two tubes and closes the spaces therebetween. lf the brick does not require more material, it is herder to malte und, therefore, more eiqiensive.V The result of this is that if the'body'briclc are all to be of tbe one [foi-n1, the central row which does not coect bricks contain more roeternil Athan 1s necessary or is more expensive the@ with the side Vferent predetermined. definite positions in manner to close spaces between tlie orc-li body and 'the sioe sheets of greatly varying Widths.

2. A locomotive furnace listing e group of srcli tubes lougitudinelly arranged therein and having side tubes spaced. from the side sheets, in combination. with on srch body resting upon the tubes and comprising a plurality of substantially identical brick. side b nicli: resting upon the arch body eX- tending upwardly into Wedging engsgement with the side sheets, the bodyugsgl ing portion thereof contai uns; u plurality of notches to rest in e termined deiinite positions ou the arci; body whereby' the side brick is adopted to take o plurality of positions varying; in distence from thecenter of the srch, es und for the purpose speeied 3. ln s locomotive furnace, o group of srch tubes ot' less Width than the rebox, in combination with" s brick 'srcli arranged usuelly require the arch body and. the varying Widths,

plurality oi? precies therein end composed oi' two brick forms, e plurality of one-form ot' brick resting upon the srch tubes and oonstitutinggtlie srch body and e. plurality off tie other .'orin of bricir resting upon tlie side oi", the .arch body und extending; upwerdly and outwardly into eugugemeut Witli the side sheet, seid side bricks having u. step-like lower end for engagement with the urcli body in e number of definite positions to close spaces between side sheets of greatly el. A side brick for locomotive :turiuaee erclies relatively tlncl et one end, relatively thin at the other end, und tapering tlierebe tween, seid tbicls end lia-ving s plurality of longitudinally extending persllel fiat sur" feces in diierentplenes und e plurslit of other longitudinally extending; *parallel flut surfaces errang-ged st substantisily :mgles thereto und exteudingvtliereb t' 5. A substantially Wedgeslispe' of substantially reetsnguler cross-section, for refrsctory tire srclies, having; s plurality of longitudinally arranged steps the bese portion thereof.

5. A side brick for locomotive furnace arches comprising u substantially wedgeshaped 'body of refractory materiel guiar in general crosssection and recessed in one side the portion adjacent tiie buse being formed with plurality of longitudinally arranged 7. A side brick for Furnece arches, coinprisingr a substantiel y wedgeslieped body refractory materiel reozsugulur in general cross-section, list/ing s pl rulity of re` cesses in one of the largest side portions, and being termed with s plurslitv uit longitudinall y znrungred steps adj so lu testimony Where-of. l li my bend, tliis lOtl'i f of bisou: the presence of tufo subscribing restau' 

